1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * NEC NL8048HL11 Panel driver 4 * 5 * Copyright (C) 2010 Texas Instruments Inc. 6 * Author: Erik Gilling <konkers@android.com> 7 * Converted to new DSS device model: Tomi Valkeinen <tomi.valkeinen@ti.com> 8 */ 9 10 #include <linux/delay.h> 11 #include <linux/err.h> 12 #include <linux/fb.h> 13 #include <linux/gpio/consumer.h> 14 #include <linux/module.h> 15 #include <linux/spi/spi.h> 16 17 #include <video/omapfb_dss.h> 18 19 struct panel_drv_data { 20 struct omap_dss_device dssdev; 21 struct omap_dss_device *in; 22 23 struct omap_video_timings videomode; 24 25 int data_lines; 26 27 struct gpio_desc *res_gpio; 28 29 struct spi_device *spi; 30 }; 31 32 #define LCD_XRES 800 33 #define LCD_YRES 480 34 /* 35 * NEC PIX Clock Ratings 36 * MIN:21.8MHz TYP:23.8MHz MAX:25.7MHz 37 */ 38 #define LCD_PIXEL_CLOCK 23800000 39 40 static const struct { 41 unsigned char addr; 42 unsigned char dat; 43 } nec_8048_init_seq[] = { 44 { 3, 0x01 }, { 0, 0x00 }, { 1, 0x01 }, { 4, 0x00 }, { 5, 0x14 }, 45 { 6, 0x24 }, { 16, 0xD7 }, { 17, 0x00 }, { 18, 0x00 }, { 19, 0x55 }, 46 { 20, 0x01 }, { 21, 0x70 }, { 22, 0x1E }, { 23, 0x25 }, { 24, 0x25 }, 47 { 25, 0x02 }, { 26, 0x02 }, { 27, 0xA0 }, { 32, 0x2F }, { 33, 0x0F }, 48 { 34, 0x0F }, { 35, 0x0F }, { 36, 0x0F }, { 37, 0x0F }, { 38, 0x0F }, 49 { 39, 0x00 }, { 40, 0x02 }, { 41, 0x02 }, { 42, 0x02 }, { 43, 0x0F }, 50 { 44, 0x0F }, { 45, 0x0F }, { 46, 0x0F }, { 47, 0x0F }, { 48, 0x0F }, 51 { 49, 0x0F }, { 50, 0x00 }, { 51, 0x02 }, { 52, 0x02 }, { 53, 0x02 }, 52 { 80, 0x0C }, { 83, 0x42 }, { 84, 0x42 }, { 85, 0x41 }, { 86, 0x14 }, 53 { 89, 0x88 }, { 90, 0x01 }, { 91, 0x00 }, { 92, 0x02 }, { 93, 0x0C }, 54 { 94, 0x1C }, { 95, 0x27 }, { 98, 0x49 }, { 99, 0x27 }, { 102, 0x76 }, 55 { 103, 0x27 }, { 112, 0x01 }, { 113, 0x0E }, { 114, 0x02 }, 56 { 115, 0x0C }, { 118, 0x0C }, { 121, 0x30 }, { 130, 0x00 }, 57 { 131, 0x00 }, { 132, 0xFC }, { 134, 0x00 }, { 136, 0x00 }, 58 { 138, 0x00 }, { 139, 0x00 }, { 140, 0x00 }, { 141, 0xFC }, 59 { 143, 0x00 }, { 145, 0x00 }, { 147, 0x00 }, { 148, 0x00 }, 60 { 149, 0x00 }, { 150, 0xFC }, { 152, 0x00 }, { 154, 0x00 }, 61 { 156, 0x00 }, { 157, 0x00 }, { 2, 0x00 }, 62 }; 63 64 static const struct omap_video_timings nec_8048_panel_timings = { 65 .x_res = LCD_XRES, 66 .y_res = LCD_YRES, 67 .pixelclock = LCD_PIXEL_CLOCK, 68 .hfp = 6, 69 .hsw = 1, 70 .hbp = 4, 71 .vfp = 3, 72 .vsw = 1, 73 .vbp = 4, 74 75 .vsync_level = OMAPDSS_SIG_ACTIVE_LOW, 76 .hsync_level = OMAPDSS_SIG_ACTIVE_LOW, 77 .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE, 78 .de_level = OMAPDSS_SIG_ACTIVE_HIGH, 79 .sync_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE, 80 }; 81 82 #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev) 83 84 static int nec_8048_spi_send(struct spi_device *spi, unsigned char reg_addr, 85 unsigned char reg_data) 86 { 87 int ret = 0; 88 unsigned int cmd = 0, data = 0; 89 90 cmd = 0x0000 | reg_addr; /* register address write */ 91 data = 0x0100 | reg_data; /* register data write */ 92 data = (cmd << 16) | data; 93 94 ret = spi_write(spi, (unsigned char *)&data, 4); 95 if (ret) 96 pr_err("error in spi_write %x\n", data); 97 98 return ret; 99 } 100 101 static int init_nec_8048_wvga_lcd(struct spi_device *spi) 102 { 103 unsigned int i; 104 /* Initialization Sequence */ 105 /* nec_8048_spi_send(spi, REG, VAL) */ 106 for (i = 0; i < (ARRAY_SIZE(nec_8048_init_seq) - 1); i++) 107 nec_8048_spi_send(spi, nec_8048_init_seq[i].addr, 108 nec_8048_init_seq[i].dat); 109 udelay(20); 110 nec_8048_spi_send(spi, nec_8048_init_seq[i].addr, 111 nec_8048_init_seq[i].dat); 112 return 0; 113 } 114 115 static int nec_8048_connect(struct omap_dss_device *dssdev) 116 { 117 struct panel_drv_data *ddata = to_panel_data(dssdev); 118 struct omap_dss_device *in = ddata->in; 119 120 if (omapdss_device_is_connected(dssdev)) 121 return 0; 122 123 return in->ops.dpi->connect(in, dssdev); 124 } 125 126 static void nec_8048_disconnect(struct omap_dss_device *dssdev) 127 { 128 struct panel_drv_data *ddata = to_panel_data(dssdev); 129 struct omap_dss_device *in = ddata->in; 130 131 if (!omapdss_device_is_connected(dssdev)) 132 return; 133 134 in->ops.dpi->disconnect(in, dssdev); 135 } 136 137 static int nec_8048_enable(struct omap_dss_device *dssdev) 138 { 139 struct panel_drv_data *ddata = to_panel_data(dssdev); 140 struct omap_dss_device *in = ddata->in; 141 int r; 142 143 if (!omapdss_device_is_connected(dssdev)) 144 return -ENODEV; 145 146 if (omapdss_device_is_enabled(dssdev)) 147 return 0; 148 149 if (ddata->data_lines) 150 in->ops.dpi->set_data_lines(in, ddata->data_lines); 151 in->ops.dpi->set_timings(in, &ddata->videomode); 152 153 r = in->ops.dpi->enable(in); 154 if (r) 155 return r; 156 157 /* Apparently existing DTSes use incorrect polarity (active high) */ 158 gpiod_set_value_cansleep(ddata->res_gpio, 1); 159 160 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; 161 162 return 0; 163 } 164 165 static void nec_8048_disable(struct omap_dss_device *dssdev) 166 { 167 struct panel_drv_data *ddata = to_panel_data(dssdev); 168 struct omap_dss_device *in = ddata->in; 169 170 if (!omapdss_device_is_enabled(dssdev)) 171 return; 172 173 /* Apparently existing DTSes use incorrect polarity (active high) */ 174 gpiod_set_value_cansleep(ddata->res_gpio, 0); 175 176 in->ops.dpi->disable(in); 177 178 dssdev->state = OMAP_DSS_DISPLAY_DISABLED; 179 } 180 181 static void nec_8048_set_timings(struct omap_dss_device *dssdev, 182 struct omap_video_timings *timings) 183 { 184 struct panel_drv_data *ddata = to_panel_data(dssdev); 185 struct omap_dss_device *in = ddata->in; 186 187 ddata->videomode = *timings; 188 dssdev->panel.timings = *timings; 189 190 in->ops.dpi->set_timings(in, timings); 191 } 192 193 static void nec_8048_get_timings(struct omap_dss_device *dssdev, 194 struct omap_video_timings *timings) 195 { 196 struct panel_drv_data *ddata = to_panel_data(dssdev); 197 198 *timings = ddata->videomode; 199 } 200 201 static int nec_8048_check_timings(struct omap_dss_device *dssdev, 202 struct omap_video_timings *timings) 203 { 204 struct panel_drv_data *ddata = to_panel_data(dssdev); 205 struct omap_dss_device *in = ddata->in; 206 207 return in->ops.dpi->check_timings(in, timings); 208 } 209 210 static struct omap_dss_driver nec_8048_ops = { 211 .connect = nec_8048_connect, 212 .disconnect = nec_8048_disconnect, 213 214 .enable = nec_8048_enable, 215 .disable = nec_8048_disable, 216 217 .set_timings = nec_8048_set_timings, 218 .get_timings = nec_8048_get_timings, 219 .check_timings = nec_8048_check_timings, 220 221 .get_resolution = omapdss_default_get_resolution, 222 }; 223 224 static int nec_8048_probe(struct spi_device *spi) 225 { 226 struct panel_drv_data *ddata; 227 struct omap_dss_device *dssdev; 228 int r; 229 230 dev_dbg(&spi->dev, "%s\n", __func__); 231 232 if (!spi->dev.of_node) 233 return -ENODEV; 234 235 spi->mode = SPI_MODE_0; 236 spi->bits_per_word = 32; 237 238 r = spi_setup(spi); 239 if (r < 0) { 240 dev_err(&spi->dev, "spi_setup failed: %d\n", r); 241 return r; 242 } 243 244 init_nec_8048_wvga_lcd(spi); 245 246 ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL); 247 if (ddata == NULL) 248 return -ENOMEM; 249 250 dev_set_drvdata(&spi->dev, ddata); 251 252 ddata->spi = spi; 253 254 ddata->in = omapdss_of_find_source_for_first_ep(spi->dev.of_node); 255 r = PTR_ERR_OR_ZERO(ddata->in); 256 if (r) { 257 dev_err(&spi->dev, "failed to find video source: %d\n", r); 258 return r; 259 } 260 261 ddata->res_gpio = devm_gpiod_get(&spi->dev, "reset", GPIOD_OUT_LOW); 262 r = PTR_ERR_OR_ZERO(ddata->res_gpio); 263 if (r) { 264 dev_err(&spi->dev, "failed to request reset gpio: %d\n", r); 265 goto err_gpio; 266 } 267 268 gpiod_set_consumer_name(ddata->res_gpio, "lcd RES"); 269 270 ddata->videomode = nec_8048_panel_timings; 271 272 dssdev = &ddata->dssdev; 273 dssdev->dev = &spi->dev; 274 dssdev->driver = &nec_8048_ops; 275 dssdev->type = OMAP_DISPLAY_TYPE_DPI; 276 dssdev->owner = THIS_MODULE; 277 dssdev->panel.timings = ddata->videomode; 278 279 r = omapdss_register_display(dssdev); 280 if (r) { 281 dev_err(&spi->dev, "Failed to register panel\n"); 282 goto err_reg; 283 } 284 285 return 0; 286 287 err_reg: 288 err_gpio: 289 omap_dss_put_device(ddata->in); 290 return r; 291 } 292 293 static void nec_8048_remove(struct spi_device *spi) 294 { 295 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev); 296 struct omap_dss_device *dssdev = &ddata->dssdev; 297 struct omap_dss_device *in = ddata->in; 298 299 dev_dbg(&ddata->spi->dev, "%s\n", __func__); 300 301 omapdss_unregister_display(dssdev); 302 303 nec_8048_disable(dssdev); 304 nec_8048_disconnect(dssdev); 305 306 omap_dss_put_device(in); 307 } 308 309 #ifdef CONFIG_PM_SLEEP 310 static int nec_8048_suspend(struct device *dev) 311 { 312 struct spi_device *spi = to_spi_device(dev); 313 314 nec_8048_spi_send(spi, 2, 0x01); 315 mdelay(40); 316 317 return 0; 318 } 319 320 static int nec_8048_resume(struct device *dev) 321 { 322 struct spi_device *spi = to_spi_device(dev); 323 324 /* reinitialize the panel */ 325 spi_setup(spi); 326 nec_8048_spi_send(spi, 2, 0x00); 327 init_nec_8048_wvga_lcd(spi); 328 329 return 0; 330 } 331 static SIMPLE_DEV_PM_OPS(nec_8048_pm_ops, nec_8048_suspend, 332 nec_8048_resume); 333 #define NEC_8048_PM_OPS (&nec_8048_pm_ops) 334 #else 335 #define NEC_8048_PM_OPS NULL 336 #endif 337 338 static const struct of_device_id nec_8048_of_match[] = { 339 { .compatible = "omapdss,nec,nl8048hl11", }, 340 {}, 341 }; 342 343 MODULE_DEVICE_TABLE(of, nec_8048_of_match); 344 345 static struct spi_driver nec_8048_driver = { 346 .driver = { 347 .name = "panel-nec-nl8048hl11", 348 .pm = NEC_8048_PM_OPS, 349 .of_match_table = nec_8048_of_match, 350 .suppress_bind_attrs = true, 351 }, 352 .probe = nec_8048_probe, 353 .remove = nec_8048_remove, 354 }; 355 356 module_spi_driver(nec_8048_driver); 357 358 MODULE_ALIAS("spi:nec,nl8048hl11"); 359 MODULE_AUTHOR("Erik Gilling <konkers@android.com>"); 360 MODULE_DESCRIPTION("NEC-NL8048HL11 Driver"); 361 MODULE_LICENSE("GPL"); 362